EP2018265A2 - Contenant en plastique multicouche - Google Patents

Contenant en plastique multicouche

Info

Publication number
EP2018265A2
EP2018265A2 EP07725297A EP07725297A EP2018265A2 EP 2018265 A2 EP2018265 A2 EP 2018265A2 EP 07725297 A EP07725297 A EP 07725297A EP 07725297 A EP07725297 A EP 07725297A EP 2018265 A2 EP2018265 A2 EP 2018265A2
Authority
EP
European Patent Office
Prior art keywords
layer
plastic
electrically conductive
hdpe
conductive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07725297A
Other languages
German (de)
English (en)
Other versions
EP2018265B1 (fr
Inventor
Klaus-Peter Schmidt
Frank Schüller
Reinhard Schubbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mauser Werke GmbH
Original Assignee
Mauser Werke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mauser Werke GmbH filed Critical Mauser Werke GmbH
Publication of EP2018265A2 publication Critical patent/EP2018265A2/fr
Application granted granted Critical
Publication of EP2018265B1 publication Critical patent/EP2018265B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
    • B65D11/06—Drums or barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/14—Explosion or fire protection arrangements on packages or ammunition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
    • Y10T428/1383—Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

Definitions

  • the present invention relates to a process for the production of electrostatically non-chargeable and / or electrically dissipative plastic containers and a multi-layer plastic container produced thereafter.
  • the plastic container may be formed as a canister or Fassett, as a closed bung barrel, as a lidded barrel with Fadeddeckel and clamping ring closure or as an inner container of a large-volume pallet container.
  • the corresponding inner containers made of plastic are mainly produced in 3-layer or 6-layer coextrusion process and have a total wall thickness of about 2 - 3 mm. The remaining residual wall thickness remaining after deduction of the conductive or permanently antistatic outer layer is less than 2 mm.
  • a wall thickness of insulating material of less than or equal to 2 mm in conjunction with a fixed electrical conductor is considered sufficiently safe, charging the opposite surface of the Insulators should be ignited which, if discharged, would ignite contents and gases of explosion groups group IIA and IIB.
  • drums or canisters are also primarily produced in multi-layer process and are characterized by the use of a conductive and / or permanent antistatic plastic material in the outer layer.
  • an electrical grounding of the contents is achieved via additionally introduced grounding elements made of conductive materials, such. B. by a in the container used Pumprohr of electrically conductive plastic, which is in electrically conductive connection with the conductive outer layer of the container EP 1 497 188 A).
  • the disadvantage here is the complete transection of the entire container wall in the longitudinal direction at one or more points, because the connection of the electrically conductive plastic strip with the plastic materia I the multilayer container wall is always a critical continuous vulnerability at higher mechanical load of the filled container
  • the requirement for in direct contact with the conductive outer layer standing insulating (inner) layers can be achieved with a residual thickness of at most 2.5 mm only by a correspondingly thick outer layer of conductive material.
  • the present invention has for its object to develop a multilayer plastic container for use in explosion protection zones and a filling with combustible products explosion group IIA and IIB such that its electrostatic suitability and improved mechanical strength, taking into account a good economy even with thick-walled containers , d. H. given wall thicknesses greater than 2 mm, is given.
  • the container according to the invention is produced as a multilayer container, preferably by extrusion blow molding and is characterized by at least one embedded (embedded) layer of electrically conductive plastic material, which the remaining wall in at least two insulating plastic layers with layer thicknesses of less than 2.5 mm divided.
  • the plastic material used in these layers consists of HDPE (High Density Polyethylene) plastic.
  • the electrically conductive plastic layer has absorbed enough electrical charge and a sufficiently high charge carrier concentration has been reached, these charge carriers easily pass through the outer insulating plastic layer with a layer thickness of less than 2.5 mm or 2 mm via an electrically dissipating support surface of the plastic container derived in the soil.
  • the negatively charged electrons / charge carriers which cause electrical charging of the inner surface of the plastic container, due to the large-area contact / contact surface of the two layers in the radial direction over a very short distance (less than or equal to 2.5 mm) the layer consisting of HDPE new material is sucked through and taken up by the electrical conductor and accumulated there.
  • the electrically conductive property of the electrically conductive plastic layer is adjusted by admixing Leitruß compounds. Since Leitruß is very expensive, the electrically conductive plastic layer is usually formed only very thin (less than / equal to 5% of the total wall thickness).
  • the innermost layer coming into contact with the liquid contents consists of virgin material and the second layer covered by the innermost layer of virgin material integrated HDPE layer by appropriate additives (such as Leitruß) is electrically conductive, said electrically conductive layer is covered to the outside of at least one further electrically non-conductive or insulating HDPE layer.
  • the material layer coming into contact with this product may consist of a particularly pure plastic raw material which is completely free of any impurities such as catalysts and stabilizers or harmful metal ions, etc. and thus the high purity requirements for the filled special products.
  • impurities of the high-purity plastic material in this case, in particular catalyst residues (catalyst residues), filler (fillers), stabilizing additives - A -
  • antioxidants antioxidants
  • plasticizers / plasticizers or process aids e.g. As stearates (stearates), etc. viewed.
  • the further, electrically non-conductive or insulating HDPE layer of a narrow vertical plastic strip of electrically conductive plastic material - in the manner of a viewing strip - is interrupted, which - viewed in the radial direction - only the strength of has another, electrically non-conductive or insulating HDPE layer and is in positive and electrically conductive connection with the integrated, electrically conductive HDPE layer.
  • the plastic container further has an uninterrupted, d. H. continuous inner layer of HDPE Neumatehal, which is designed as thin as necessary and has a wall thickness of only 0.5 - 1 mm, so that electrical charges well "sucked through” and are absorbed by the "inner" integrated electrically conductive plastic layer can.
  • This integrated electrically conductive plastic layer is now on the narrow vertical contact strip made of electrically conductive plastic material, the process technology in the manner of a known reformst shapes in which the outer, electrically non-conductive or insulating HDPE layer is introduced and in the bottom region of the container up to the cutting seam runs, in very good electrically conductive connection with the electrically dissipating footprint of the plastic container.
  • the latter has, in another exemplary embodiment, a four-layer wall structure, wherein the fourth plastic layer covers the previous three layers from the outside and also consists of electrically conductive HDPE plastic material.
  • the third, consisting of non-conductive plastic material layer is also interrupted by a narrow vertical contact strip of electrically conductive plastic material - like a sight strip - the - viewed in the radial direction - only the strength of the electrically not has conductive or insulating HDPE layer, and serves as a quasi-conductor bridge and brings the integrated inner plastic layer of electrically conductive plastic material with the fourth outer layer of electrically conductive plastic material in direct electrically conductive connection.
  • the one-piece (one-piece) produced by extrusion blow molding plastic container is designed with at least three layers, for special applications in four or seven layers and is characterized by the following layer structure:
  • HDPE 3 outside ⁇ 2 5 mm insulating plastic
  • a sensitive filling material advantageously does not come into contact with the electrically conductive plastic layer (with conductive black).
  • the corresponding layer structure ensures that the maximum occurring layer thickness of the insulating plastic layers in the overall wall is below the thickness of 2.5 mm and thus a critical electrical charge of exposed insulating surfaces is excluded. Consumption of the costly conductive plastic material is reduced by the thinnest possible design of the corresponding layers. In this case, the very thin layers of conductive plastic material behave much more flexible than a thick, brittle fracture-sensitive plastic layer with Leitruß on the outside of a corresponding container, so that thereby the cold resistance is significantly improved. It should be noted that the addition of Leitruß - as is well known - can significantly degrade the mechanical properties of electrically conductive plastics.
  • the container according to the invention in the embodiment with electrically conductive plastic layers can also be carried out to the effect that the insulating plastic layers partially interrupted or bridged by conductive plastic material and thus the conductive layers within the container wall are conductively connected to each other.
  • An essential feature of this local layer interruption is that the partial interruption of a layer is not carried out in the radial direction to interrupt other layers or all layers, so that no, throughout the wall thickness pronounced, continuous conductive connection is formed.
  • This advantageous embodiment in turn ensures that mechanical weak points in the form of continuous accumulations of material (in the radial direction as in the axial direction) of the brittle conductive plastic in similar known approaches today (DE 102 42 955 Seh.) Are avoided and greatly improved the drop resistance accordingly executed container becomes.
  • the execution of the locally limited conductive strips within the non-conductive insulating plastic layers of the container wall preferably takes place parallel to the barrel longitudinal axis in the vertical direction over the barrel body and radially over the lower / upper floor of the container.
  • Other, z. B. point or spiral versions of the conductive contact strips are possible.
  • the number of local conductive junctions is set to at least one per insulating layer.
  • Other local conductive connecting strips per layer are readily possible and can be used depending on the process engineering implementation.
  • the position of the local conductive connection strips is - as seen in the circumferential direction - freely selectable for different, mutually staggered versions in the individual insulating layers.
  • the two local conductive strips in the individual layers are arranged offset by 180 ° from one another.
  • FIG. 1 shows a plastic container according to the invention as 220 I L-ring barrel
  • Figure 2 shows a 3-layer structure according to the invention with a conductive middle layer
  • Figure 3 shows a 4-layer structure according to the invention with a conductive middle layer
  • Figure 4 shows a 7-layer structure according to the invention
  • FIG. 5 shows a 4-layer structure with a conductive middle layer and local conductive layers
  • Strip in the insulating layers and Figure 6 shows a 7-layer structure with conductive middle layer and local conductive
  • the plastic container according to the invention can, for. B. as a canister or Fassett, as a bung barrel, as a lidded barrel with barrel lid and clamping ring closure or be designed as an inner container of a large-volume pallet container.
  • a plastic container has vertically extending container walls with horizontally extending container upper floor and underbody, wherein a gas and liquid-tight sealable filling and emptying opening is arranged at least in the container upper floor or in the container lid.
  • a 220 liter bung barrel is shown as an exemplary embodiment and designated by the reference numeral 10.
  • the average total wall thickness of this bung barrel is about 3 mm to 3.5 mm with a normal weight of 8.5 kg in the jacket area.
  • the average total wall thickness is approximately 3.5 mm to 4.5 mm.
  • X rectangular wall piece is denoted by "X”, whose wall structure is explained and described in detail in the following drawings in various embodiments.
  • regenereratmaterial is preferably high density polymer Ethylene (HD-PE eg Lupolen 5021 D) or high molecular weight ethylene (HM-PE eg Lupolen 5261 Z).
  • HD-PE high density polymer Ethylene
  • HM-PE high molecular weight ethylene
  • the rectangular wall piece "X" is shown in Figure 2 with a three-layer wall structure, in which the inner, coming into contact with the contents layer 12 of HDPE virgin, the middle thin layer 14 by adding Leitruß from electrically conductive HD-PE plastic and the outer layer 16 again of HD-PE virgin, optionally mixed with, z. B. blue color pigments exists.
  • FIG. 3 A particularly preferred embodiment is shown in FIG. 3 with a four-layer wall construction according to the invention with a thin conductive inner layer.
  • HDPE virgin material insulating plastic
  • Leitruß conductive plastic
  • the wall structure for achieving optimum barrier properties against escape of volatile constituents (eg hydrocarbons, carbon dioxide, aroma substances or the like) from the contents is still three further thin layers 20, 22 and 24 supplemented, which are arranged between the comparatively thin electrically conductive layer 14 and the comparatively thick layer 16.
  • the layer 22 of insulating barrier plastic (polyamide PA or EVOH) and the two adjacent layers 20 and 24 are made of insulating adhesion promoter (Admer) to obtain a stoffschl mannerige connection between the different plastic materials (HD-PE and polyamide PA or EVOH) otherwise they would not stick together in direct contact without adhesion promoter.
  • the layer thickness of these three thin layers 20, 22 and 24 is approximately only 3% of the total wall thickness.
  • the EVOH layer ethyl vinyl alcohol
  • the exemplary embodiment illustrated in FIG. 5 again involves a four-layered wall structure as in FIG. 3, although here at least two in the longitudinal direction of the container are provided in the insulating plastic layers 12 and 16 or vertically extending strips 26 and 28 are introduced from electrically conductive plastic. It could z. B. also be incorporated in each case two of these strips.
  • the strips may have a width (in the circumferential direction) of about 10 mm to 50 mm.
  • These strips 26 and 28 constitute, on the one hand, an electrical connection bridge between the liquid product and the inner electrically conductive thin film 14 and, on the other hand, an electrical connection bridge between the inner electrically conductive thin film 14 and the electrically conductive thin film or outer layer 18.
  • electrical grounding serving strips 26 and 28 are introduced according to a conventional type of strip of vision in the tubular preform, which is extruded from an annular nozzle of a peripheral extrusion or extrusion storage head and inflated by means of compressed air in a blow mold to the finished container.
  • the two strips 26, 28 extend in the radial direction only partially or not completely continuous in the wall of the respective container.
  • the two strips 26 and 28 are also laterally spaced from each other and offset from each other at different circumferential positions of the plastic container.
  • this method variant is realized with the at least two vertically extending and circumferentially spaced contact strips for a plastic container with seven-layer wall structure, as shown in Figure 6.
  • the electrically conductive plastic strip 26 extends here only within the thick electrically non-conductive plastic layer 12 and establishes the electrical connection between the filling material and the inner conductive thin film 14, while the strip 30 is now radially over the layers 20, 22, 24 and 16 and thereby forms an electrical bridge between the integrated electrically conductive thin film 14 and the electrically conductive thin outer layer 18.
  • the inner integrated, electrically conductive HDPE layer is at least one, in the innermost, in contact with the filling material in contact layer of insulating plastic (HDPE virgin) contact strip of electrically conductive plastic material with the contents in the container interior in a conductive connection and furthermore via at least one additional contact strip of electrically conductive plastic material inserted into the remaining, the inner integrated, electrically conductive HDPE layer from outside covering layers of non-conductive plastic material (without Leitrußzusatz) with in the outer, electrically conductive plastic layer in electrically conductive connection.
  • an electrical connection can therefore be formed between the inner and outer surfaces of the container if required.
  • the strength of the individual local connection here is - viewed in the radial direction - smaller than the total wall thickness of the container. Due to the advantageous avoidance of fully continuous strips of electrically conductive plastic material, the deterioration of the cold resistance that would otherwise be tolerated is greatly reduced.
  • the present invention is characterized in that from at least three extruders three different plastic materials are conveyed into a peripheral distributor and formed into an at least three-layer tubular preform, wherein the inner layer of an electrically non-conductive plastic material (HDPE virgin), the Inner layer covered integrated layer of an electrically conductive plastic material (eg HDPE with Leitrußzusatz) and another outer layer in turn of an electrically non-conductive plastic material (HDPE), and wherein this tubular preform in a conventional manner in a corresponding blow mold by means of compressed air a plastic hollow body is inflated.
  • the peripheral distributor is additionally provided with suitable means for introducing the contact strips of electrically conductive plastic material into the inside and / or outside layers of electrically non-conductive plastic material at the desired location.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Wrappers (AREA)

Abstract

L'invention concerne un contenant en plastique multicouche dont le matériau est thermoplastique, ce contenant servant au stockage et au transport de produits liquides, notamment de produits inflammables ou explosifs. Ce contenant est composé d'au moins trois couches superposées et il est doté, pour dévier une charge électrique, d'une couche de déviation électrique qui, sur les contenants classiques, forme habituellement la couche externe. Des mesures spéciales doivent être prises pour relier le contenu à la terre. L'invention est caractérisée en ce que des mesures spéciales de mise à la terre pour le contenu ne sont pas nécessaires, grâce à la nouvelle conception dudit contenant, où la couche la plus à l'intérieur et en contact avec le produit liquide est en matière vierge, et seulement une deuxième couche interne intégrée et recouverte par la couche la plus à l'intérieur en matière vierge est rendue électriquement conductrice par des additifs correspondants (comme, par ex., suie conductrice ou similaire), cette couche électroconductrice étant recouverte vers l'extérieur par au moins une autre couche électriquement non conductrice. Ainsi, des porteurs de charge électrique de la deuxième couche électroconductrice, porteurs de charge que le frottement avec le contenu fait se regrouper à la surface de la fine couche intérieure, sont sur de grandes surfaces "absorbés" et déviés par la couche intérieure électriquement non conductrice.
EP07725297.1A 2006-05-18 2007-05-16 Contenant en plastique multicouche Active EP2018265B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006008091 2006-05-18
PCT/EP2007/004382 WO2007134781A2 (fr) 2006-05-18 2007-05-16 Contenant en plastique multicouche

Publications (2)

Publication Number Publication Date
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JP5584031B2 (ja) * 2010-07-09 2014-09-03 株式会社ダイセル 発射装薬の収納容器
PL220004B1 (pl) 2012-06-04 2015-08-31 Mtb Poland Spółka Z Ograniczoną Odpowiedzialnością Sposób wytwarzania sprzętu zaopatrzenia ortopedycznego, zwłaszcza wyposażonego w sztywne elementy do aktywnej stymulacji obszarów urazu
JP6156184B2 (ja) * 2014-02-21 2017-07-05 豊田合成株式会社 燃料供給装置
CN104263262A (zh) * 2014-04-28 2015-01-07 苏州恒坤精密电子有限公司 一种新型胶膜
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DE102015106960A1 (de) * 2015-05-05 2016-11-10 Bodo Richter Verfahren und Vorrichtung zur Herstellung großvolumiger Behälter mit Flansch durch Kunststoff-Blasformen
DE202017100694U1 (de) * 2017-02-09 2018-05-11 Bodo Richter Doppelfass für Gefahrengüter
IT201900014271A1 (it) * 2019-08-07 2021-02-07 Saipem Spa Serbatoio di stoccaggio subacqueo
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CN101500792B (zh) 2014-03-05
JP5124565B2 (ja) 2013-01-23
AU2007251935B2 (en) 2011-10-06
MY149059A (en) 2013-07-15
CA2652580C (fr) 2014-12-30
WO2007134781A3 (fr) 2008-01-17
DE112007001225A5 (de) 2009-04-23
US20120160729A1 (en) 2012-06-28
KR101376627B1 (ko) 2014-03-19
JP2009537402A (ja) 2009-10-29
MX2008014601A (es) 2008-11-28
WO2007134781A2 (fr) 2007-11-29
US20090269530A1 (en) 2009-10-29
ES2584835T3 (es) 2016-09-29
BRPI0712033A2 (pt) 2011-12-20
SG171642A1 (en) 2011-06-29
BRPI0712033B1 (pt) 2018-01-23
CN101500792A (zh) 2009-08-05
IL195275A (en) 2014-11-30
ZA200809816B (en) 2010-02-24
AU2007251935A1 (en) 2007-11-29
KR20090029720A (ko) 2009-03-23
IL195275A0 (en) 2009-08-03
US8383219B2 (en) 2013-02-26
EP2018265B1 (fr) 2016-04-27
CA2652580A1 (fr) 2007-11-29

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